CVE-2026-82407

Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.20, core/kapp/validators/validators.go Register and the runtime validator update path accept a submitted BLSPublicKey without curve, prime-order subgroup, or nonzero validation. When a validator with a malformed key becomes eligible and is selected into a consensus group, MultiSigner.Reset and the corresponding signature verification creation path cannot deserialize the group key and cancel the slot. This causes repeated missed rounds and throughput degradation, and a network whose consensus group equals the eligible validator set can halt completely. Genesis validation is not affected because that path already performs CheckPublicKeyValid. This issue is fixed in version 1.7.20.

• CWE-20

• https://github.com/klever-io/klever-go/commit/11606a90ccc289f93d0175994733229b332d9cff
• https://github.com/klever-io/klever-go/commit/642da967893884d635986fed3c43bdc679cbfe8f
• https://github.com/klever-io/klever-go/releases/tag/v1.7.20
• https://github.com/klever-io/klever-go/security/advisories/GHSA-9wh6-9hq7-9688
• https://github.com/klever-io/klever-go/security/advisories/GHSA-9wh6-9hq7-9688

Published

Sep 23, 2026

Last Modified

Sep 23, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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